Why no Mortarboard for me?
I got more than 200 reputation on Stack Overflow today but didn't get the Mortarboard badge. I was so excited to finally get it but then - nothing :( How come? Is there a bug?
You need 200 points from votes alone to gain
See this post: Why no Mortarboard for me?
Another post (from diamond moderator): Why don't I have the 'Mortarboard' badge? It clearly states +2 from accepts don't count to avoid gaming the system.
You have quite a few accepted answers.
Your reputation page: http://stackoverflow.com/users/561309/laurent?tab=reputation